How to Solve Excessive Black or Grey Smoke for Detroit EPA07 GHG14 Engine

This instruction show you guide on how to solve excessive black or grey smoke for Detroit EPA07 GHG14 engine .

Preparations:

2024.06 Detroit Diesel Diagnostic Link DDDL 8.20 8.09 Free Download

JPRO DLA+ 2.0 Adapter

NEXIQ USB Link 2 Adapter

 

Procedures:

To check for excessive black or grey smoke perform the following:

 

1 Verify proper ultra-low sulfur diesel fuel is being used. Is the correct fuel being used?

1a Yes; Go to step 3.

1b No; Go to step 2.

 

2 Run engine from a known good fuel source. Go to step 3.

 

3Start and run the engine.

 

4Run the engine at idle with no-load for approximately five minutes, allowing the engine coolant to reach normal operating range.

 

5 Visually inspect exhaust pipe for excessive black or grey smoke.

5a If the engine exhaust smoke emission appears normal, no further troubleshooting is required. Shut down the engine.

5b If the engine exhaust smoke is excessively black or gray, shut down the engine. Go to step 6.

 

6 Check the air cleaner for restriction.

6a If the air cleaner is restricted, remove the air filter element from the air cleaner container; refer to OEM guidelines.

6b If the air cleaner is not restricted. Go to step 7.

 

7 Attach the air-to-air cooler test kit (J-41473); refer to OEM guidelines.

8Disconnect the air inlet hose from the outlet side of the turbocharger compressor housing.

9Attach the air-to-air cooler test kit adaptor plug to fit into the hose at the compressor connector. Refer to OEM guidelines.

 

10 Attach an air pressure hose to the air chuck at the regulator and gradually pressurize the air inlet system to a pressure of 177 kPa (25 psi).

 

11 Apply a water and soap solution to each hose connection, across the face of the charge air cooler.

 

12 Apply a water and soap solution to the air intake manifold and cylinder head mating surface area.

 

13 Visually inspect all joints for air leaks and all charge air cooler welded surfaces for stress cracks.

13a If air leaks are present around the joints, replace the charge air cooler. Refer to OEM guidelines.

13b If air leaks are present around the air intake manifold. Repair as necessary.

13c If NO air leaks are present Go to step 14.

 

14Remove the Exhaust Gas Recirculation (EGR) hot pipe. Refer to section “Removal of the Exhaust Gas Recirculation Hot Pipe”

 

15 Using DDDL 7.X command the EGR valve from full open to full closed. Visually verify that the EGR valve fully opens and fully closes.

15a If the EGR valve fully opens and fully closes, Go to step 18.

15b If the EGR valve does not fully open and fully close, Go to step 16.

 

16 With the ignition OFF, manually check the EGR valve and actuator by sweeping for smoothness. Is binding is present?

16a If yes, remove the pull rod and sweep the EGR Valve. If the EGR valve or the EGR pull rod binds, Go to step 17.

16b If no binding is present, reset the EGR Valve actuator end stops using DDDL 7.X.

 

17 Check the EGR valve for excessive soot buildup.

For the DD13 Refer to section “Removal of the Exhaust Manifold”

For the DD15 and DD16 Refer to section “Removal of the DD15 and DD16 Exhaust Gas Recirculation Valve”

17a If buildup exists, clean or replace as necessary.

17b If no buildup exists, Go to step 18.

 

18 Check for soot or buildup in the EGR crossover tube. Refer to section “Removal of the Exhaust Gas Recirculation Crossover Tube”

18a If soot is found, clean the EGR crossover tube.

18b If no soot is found, Go to step 19.

 

19Check the Delta P sensor for leaks and blockage.

19a If the Delta P sensor leaks or has blockage, clean or replace the Delta P sensor. Refer to section “Removal of the Delta P Sensor”

19b If the Delta P does not leak or have blockage, check for a cracked or leaking intake manifold or gaskets. Repair as necessary.

 

More repair cases for Detroit Diesel engines,please refer to:Detroit Diesel Engine Repair